Part of a user interface of a drilling machine



FIG. 1 is a top, front and right side perspective view of a first embodiment of a part of a user interface of a drilling machine showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front side view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a top, front and left side perspective view of a second embodiment of a part of a user interface of a drilling machine showing our new design. The second embodiment is a mirror image of the first embodiment and, therefore, not further illustrated.

The broken line showing in the figure drawings is included for the purpose of illustrating environmental detail and forms no part of the claimed design. 

The ornamental design for a part of a user interface of a drilling machine, as shown and described. 